Volley Post with JSON - getting 422 Status Code

Question

I am trying to use Volley to send a JSON object to a Loopback application API which is using MongoDB. I can see that the data is being saved in the database successfully. But the Volley response always shows that the status code is 422. Can someone point out what I am doing wrong?

This is the error message:

BasicNetwork.performRequest: Unexpected response code 422 for http://localhost:3001/api/Persons

This is the JSON I am trying to send:

{
  "map_coordinates": {
    "lat": xxxxxx,
    "lng": xxxxxxx
  },
  "first_name": "xxxxx",
  "middle_name": "",
  "family_name": "xxxxxx",
  "gender": "xxxxxx",
  "role": "xxxxxx",
  "dob": "2017-09-28T05:51:40.836Z",
  "picture_of_person": "",
  "username": "ajxxxx7@gmail.com",
  "deviceToken": "xxxxxxxx",
  "portal_address": "xxxxx",
  "email": "ajxxxxx7@gmail.com",
  "password": "xxxxxxx",
  "vcode": 562991,
  "mobile": "+91xxxxxxxx"
}

I do not think that there is a problem with the JSON because, if I POST the same object from the Loopback explorer then the request goes through successfully and returns status code 200.

This is the code I am using to send the JSON request.

public void postJsonRequest(String url, JSONObject data, final Callback<JSONObject, VolleyError> callback) {
    JsonObjectRequest objectRequest = new JsonObjectRequest(Request.Method.POST,
            url, data, new Response.Listener<JSONObject>() {
        @Override
        public void onResponse(JSONObject response) {
            callback.onSuccess(response);
        }
    }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {
            callback.onFailure(error);
        }
    });
    makeJsonRequest(objectRequest);
}

private void makeJsonRequest(JsonObjectRequest request) {
    RequestQueue queue = Volley.newRequestQueue(EngageMyTime.getInstance().getEMTContext());
    queue.add(request);
}

Any help/idea would be appreciated.

Answer 1

Try to set the default charset UTF-8 on server side and encode in UTF-8 the json data before send

In android with

URLEncoder.encode(string,"UTF-8");